Medical device is a product which is used for medical purposes in patients in diagnosis, therapy or surgery. The main lists of medical devices are high risk devices, medium risk devices and low risk devices. The several high risk devices are Anesthesia ventilators, Anesthesia units, Apnea monitors, Argon enhanced coagulation units, Aspirators, Fetal monitors, External pacemaker, etc. The few medium risk devices are ECG, EEG, Treadmills, Ultrasound sensors, Phototherapy units, Endoscopes, Laparoscopic insufflators, Phonocardiographs, etc. Some of low risk devices are Electronic thermometer, Breast pumps, Surgical microscope, Ultrasonic nebulizers, Sphygmomanometers, Surgical table, Surgical lights, Temperature monitor, Aspirators and X-rays diagnostic equipment.